The Ampeg V-4B All-Tube Bass Amplifier Head brings back the remarkable all-tube tone of the legendary 1971 original by Ampeg! With this amp you can achieve that pure tube tone and unmistakable grind that made the original a true classic. Ampeg gives the V-4B amp a set of modern features for today’s bassist as well as vintage looks. 100 watts of warm, dynamic tone is provided by four 6L6 power tubes, two 12AX7 preamp tubes, and one 12AX7 and one 12AU7 driver tubes.